Filtering apparatus



NW. 12, 193 K. NAGAO ,0

' FILTERING APPARATUS Filed on. 6, 1953 iii: Iii": 14

' current as well as by centrifugal force at thering operation. I n the drawing Fig. 1 is a longitudinal -sec-.

Patented Nov. 12, 1935 UNITED STATES m'mnnwd APPARATUS Kinya Nagao, Fukazawamachi, Setagaya District, Tokyo, Japan Application October 6, 1933, Serial No. 692,532

The present invention relates to filtering apparatus in which fibers are accumulated to constitute the filtering layer automatically by liquid beginning of filtering operation while the said filtering layer is disintegrated into individual fibers to be easily purified by a current of washing water when the filtering operation is conplying fluid to be filtered and afilter-drum to be rotated around the said pipe, the said liquid supplying pipe possessing a. great number of jets communicating with the interior of the drum and the latter containing a suitable 'quantity of asbestos fibers or the like. When the drum is rotated either by hand or mechanically and at the same time fluid to be filtered is passed into the conduit-pipe, the fluid from the jets agitates the asbestos fibers or the like and passes outwards through holes in the'drum leaving the fibers on theinterior side of the drum to constitute an evenly distributed filtering layer. Should the rotation of the drum stop, the filtering layer of fibers is kept at the same state by fiuidcurrent spouted from numerous jets-of the conduit-pipe and cleanfiltrate purified by passing through the holes of the filtering layer of fibers flows out from the filter-drum, thus filtration is easily and tional view of an embodiment of my invention under one form. Fig. 2 is a side elevation partly in-section of a modified form of the apparatus embodying my invention.

I Referring to Fig. 1, I indicates a filter-drum, 2 numerous holes perforated through the circum-' ference of the said drum, 3 wire netting, 4 cloth woven with asbestos fibers, 5 conduit-pipe supplying liquid to be filtered into the drum and serving as shaft or axle upon which the drum is rotatably mounted, 6 a great many jets provided 7 nal section. From I to 9 denotes the corresponding parts as in Fig. 1, and N indicates agitators fixed to the conduit-pipe, H agitators loosely mounted on the conduit-pipe and tending to oscillate under the impact of the water jets and 5 the rotation of the drum, I2 is a gear-wheel attached to one end of the filter-drum, I3 is a gearwheel engaged with the said gear-wheel l2, I4 is a rotating handle and IS an outflow pipe. The filtering operation may be carried out in the same manner as explained in the foregoing embodiment, while in the case where fibers are to be washed, if the lower half of the drum is soaked in washing water and the drum is rotated, fibers tending to follow the interior surface of the rotating drum are checked 'by the fixed agitators I0 and caused to fall down and be washed promptly by the oscillating agitators ll.

Although various fibers such as, for example, artificial silk, natural silk, wool, cotton, hemp, go ramie, glass wool or the like may be adapted as the filter-layer forming fibers in the present invention, asbestos fiber, which neither rots nor degrades, consequently never needs to be changed for new ones and moreover has strong adsorbing power, is one of the most preferable for filtration of, various kinds of liquids.

While filtration by using hitherto known filteringapparatus'is not only troublesome but also often .dimcult, automatic constitutionof filtering '0 layer of fibers and purification of the filtering layer constituting fibers in the apparatus in accordance with he present invention are both simple and easy. 'In consequence it is not only very convenient but also shows remarkable efli- I5 ciency in filtering various kinds of liquids or solutions in factorys, households, swimming pools .or the like.

fi filtering apparatus comprising a horizontal 4 liquid supply pipe, having jet openings and fixed- 1y mounted on suitable supports, a series of agitators fixedly attached to said pipe and a series f agitators loosely mounted on said pipe and ranged and adapted to freely oscillate, a flltermg drum having a perforated wall and rotatably mounted on said pipe said agitators being disposed within said drum andexten'ding adjacent i the perforated -wall thereof, means for rotating said drum reiatively to said pipe, a loosely situated .layenof fibrous material within said drum and arranged and adapted to be spread upon the interior surface '01- the drum by centrifugal force and, bythe action of the jets," projected through the jet openings of the supply pipe and to constitute a filtering medium for the liquid supplied to the interior of the drum.

HNYA 'NAGAO. I 

